Dental attachment



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JMI

Sept. 11,1923.

WITNESSES demos J. \STFWEK A TTORIVEYS' Patented Sept. ll, 1923.

JACOB STARK, OF'BRQOKLYN, NEW YORK.

DE TAL ATTACHMENT.

Application filed December 5, 1922. Serial No. 605,134.

T 0 all wkomt may concern; r

Be itqknown thatl, JACOBJ. STARK, a citizen the United States, and a resident of thecity of New Yorkilborough of Brooklyn, in .the 'countyof Kings and State of New York, have invented certain newand. useful-Dental Attachments, of which the following is a tull, clear, and. exact 'description. V a V r This invention relates toattachments for dental lathes, and Vmore particularly aims to provide, asa new article of manufacture,

a powerimixer for inateriaL for making dental casts, and comprising a self'contained structure attachablewas horizontal spindle :of adentallathe', such structureincluding aireceptacle for the;mix,and a beater therein rotatable about a horizontal axis. V A

:Another object is to provide a structure ol? the kindjustindicated in which a simle inex )ensive and ru ed 1 frame has a i i r r 9 base so shaped and carries an operative connection between a coupling for the lathe spindleandithe beater shaft in such a way,

that the tendencies v0t the rotating par-ts combine to maintain the support flat. and secure on ;the lathe table, during operation ogr -the mixer, and Without having'to screwor clamp the-support to such table.

A"'further object to provide a collection Qofiparts as last deiscribediandincluding receptacle for the mix lobe-acted on by the water, which is readilyremovable from the new structure even without disengaging the latter from the lathe. Y r

Still a further object 13 to provide a c0mbinationotfparts adapted-to attain the variousends above enumerated and also in eluding albeater shaft vertically jour'nalled in the receptacle and adapted "for instantane ,ous engagement."with "and disengagement from the-lowerfend o lavertical shaft forming; a pernianentpart: of theself-contained i-structure and adapted to beal gncd with the beater shaft such engagement and disengagement of the twovertical shafts naturally .Vaccompanying I a horizontal translation of the recept: i cl.e"i'nto andout ofthe selfconainedstructure. I Y a A furtherfobject'isto provide the combination ofparts as characterizedabove, in

rwhichrthe receptacle will have a vertically removable" cover forming the permanent supportin which is ournalled. the beater shaft; totheend that said shaft-may per manently carry the heater in such away and be associated with the body of the receptacle in suchaway that the beater may properly act on the mix in the receptacle and yetloe withdrawn from such mix with the cover when the latter is removed ifollow contained structure. I

ing removal of the receptacle from: the self- 7 A further object of the invention is to provide astructure as already explained, in

which the heater is a plane plate and yet provided wlth shaped edges so arranged and related that ajsurprisingly eflicient spiral agitation of the mix results from rota tlon of the beater, thereby to obtain a thor-q ough mix in a fraction of the time heretofore required.

-With' these and variousother objects in view, theinvention consists of certain novel features of construction, and combinations and arrangements of parts, as will hereinafter he described and pointed out in the claims.

a 'In the accompanying drawing, which shows byway oiexample, a possible structure accordinpj'to the invention-as at present preferred, and inwhich simliar reference characters refer to similar parts tl'iioughout the severalviews; i

Fig. l is a vertical axial section taken through the self-contained structure constituting the new attachment, as coupled to a dental lathe, such lathc'and certain of the .parts oi? the attachment being shown in ele ration;

V Fig. 2 is a fragmentary view, in plan, showing the main post of the structure and the two shaft-j ournalling arms thereof;

Fig. 3 is a horizontal central view, taken on,line of F 19;. 1, but with certain oi the parts shown in plan and some'of these parts partially broken away; and

F g; 4- is, a partlal sect onal, composite View, looking upward towards the bottom of -thelpermanent verticalsha'lt of the sell? contained structure and looking downward towardthetop o f the heater shaft above the receptacle cover wUpon a conventional lathe table 5 isa-n-r' 'chored a familiar dental lathe as indicated at 6 provided with a horizontal shaft or spindle terminating: as jshownin a projecting concd end 7 constitutingreally a check for a taperbored coupling of the type indicated at 8.

Suchcoupling here is a permanent part of the new self-contained structure, which cally of the container for rotation about the axis of the container, said beater being a thin plane plate having a straight bottom edge close to and substantially parallel With the bottom of the, container and having side edges above said bottom each close to and substantially parallel with the side Wall of the container, said plate having a portion cut away from one side edge of the plate to provide a scalloped side edge for the plate, said 10 

